Chapter 18, Problem 18.140EP

(a)

Interpretation Introduction

Interpretation: The validation about the presence of one or more galactose unit(s) in cellobiose has to be predicted.

Concept introduction: Cellobiose is a disaccharide that has two units of D-glucose.  The glycosidic linkage present is $\text{β}\left(1\to 4\right)$ linkage.

(b)

Interpretation Introduction

Interpretation: The validation about the presence of one or more galactose unit(s) in fructose has to be predicted.

Concept introduction: Fructose is a monosaccharide that has a chain of six carbon atoms and ketone as a functional group.  It is also known as levulose and fruit sugar.

(c)

Interpretation Introduction

Interpretation: The validation about the presence of one or more galactose unit(s) in raffinose has to be predicted.

Concept introduction: Raffinose is an oligosaccharide which has one unit of $\text{α}-\text{D}\text{galactose}$, one unit of $\text{α}-\text{D}\text{glucose}$ and one unit of $\text{β}-\text{D}\text{fructose}$.

(d)

Interpretation Introduction

Interpretation: The validation about the presence of one or more galactose unit(s) in maltose has to be predicted.

Concept introduction: Maltose is a disaccharide made up of two units of D-glucose.  The structure of maltose has no units of galactose.